Hi,
I've had RSD for 15 years also, spread throughout my body. I'm having the same issues with my scalp .. Pain when I moved my fingers through my hair, burning scalp, itching.. and I was diagnosed with lichen planopilaris.

Amazing.. I don't feel so alone after reading all of this. I'm sorry for what your going through. RSD is truly awful. Especially when it gets to your head.. Literally..